| APA | SDOF. (2012, February 15). In Acronym Geek. Retrieved 20:52, February 15, 2012, from http://www.acronymgeek.com/SDOF |
| MLA | "SDOF." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/SDOF>. |
| MHRA | 'SDOF', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/SDOF> [accessed 15 February 2012] |
| Chicago | "SDOF", http://www.acronymgeek.com/SDOF (accessed February 15, 2012). |
| CBE/CSE | SDOF [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/SDOF. |
| Bluebook | SDOF, http://www.acronymgeek.com/SDOF (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SDOF, http://www.acronymgeek.com/SDOF (optional description here) (as of Feb. 15, 2012, 20:52). |
| AMA | SDOF. Acronym Geek. February 15, 2012, 20:52. Available at: http://www.acronymgeek.com/SDOF. Accessed February 15, 2012, 20:52. |